I have a concert and a tenor Transit bag. I really like those bags for several reasons.
Protection, material, and build: Really well padded. Soft padding where needed. It's rather rigid for a bag (as opposed to a case that is expected to be rigid) and will not collapse if empty. Quality material and build.
Space and practicality: It's a specious bag inside. There's room for the uke, the humidifier bag, the straps. the outside pocket fits your tuner and capo easily and a some folded music sheets. Overall it's lighter than a case and easy to carry. You can put some backpack straps on those and walk around town.
I'd recommend. They shipped my Kala Elite in this bag. At first, I thought it was kinda cheap to send such an nice instrument in a standard bag. But once I received it, I was really impressed. There's nothing standard about this bag. It's well made, looks sleek, and protects your uke very well. I even prefer it over my other solid case. And it's also very well priced!
Only con: I felt that the concert bag was kinda snug on the height. There's enough of room on the width and length, but it's really snug on the height. It doesn't damage my instrument, but I was hesitant to close the bag the first couple of times.